@inproceedings{CTT100860231,
  author = {Naotake Yamamoto and Taichi Sasaki and Atsushi Yamamoto and Tetsuya Hishikawa and Kentaro Saito and Jun-ichi Takada and Toshiyuki Maeyama},
  title = {A Study on Path Loss Prediction Formula for IoT wireless system close to Concrete Ceiling with Flat Surface in 920MHz band},
  booktitle = {IEICE Technical Report},
  year = 2021,
}